Abstract

Some phenothiazine derivative dyes and triphenylmethane dyes doped into water-swollen gelatin matrices were studied with respect to their ability of thick hologram formation with a low power conventional HeNe laser source. The highest light diffraction efficiencies measured in a self-diffraction experiment were obtained for the well known methylene blue dye but also for other dyes related to it: Giemsa and May-Grunwald stains. For the first time to our knowledge hologram formation abilities were found for crystal violet and brilliant blue dyes in water-swollen gelatin.

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